Yarn twisting or wrapping device



- E. G. EGGE YARN TWISTING OR WRAPPING DEVICE Aug. 26, 1952 2 SHEETSSHEET 1 Filed April 25, 1951 'INVENTOR. [fill AV 6'. [662' 4km '4. mm

ATTORNEY Patented Aug. 26, 1952 UNITED STATES ATENT OFrFIC E-V YARN TWISTING R VVRA?PING DEVICE Edwin G. Egge, Providence, R. I., assignor to United States Rubber Company, New York,, N. Y., a corporation of New Jersey Application April-25, 1951, Serial ndezznso Thi invention relates. to a small yarn guiding cap that isrotatably mounted upon the upper end of a yarn supporting spindle and is adapted for use, when such spindle is rotated, as a yarn twisting or yarn wrapping device.

The cap of the presentinvention is an improvement over the cap shown, described and claimed in my Patent No. 2', 488,970'for Core Covering Device. .In Workingwith the cap of said patent it was 'founddesirable to pro'vide means for controlling. thetensi'o'n of the covering yarn as it passes fromthe-supply package to the core cover'ing position.

One important feature of the present invention resides ina core Covering or yarn twisting cap that. can ,be operated. at very high speed and which comprises a cylinder or ring having a bridge bar spanning, such cylinder or ring and arranged so thatthe yarn supplied to this cap froma rotating package can be given any desired tension by looping it partly or' entirely around the bridge bar as it. approaches the central guide hole ofthe cap. f .I

The cap of thepres'ent invention. preferably is nolarger in diameter thanf-the package supporting spindle, so that the package with itsadapter can be doffed without removing the cap from its spindle. Furthermoreth'e cap is so small and light and it'controls the yarn so Well that it is possible to rotate its supporting spindle at very high speed,. such as-20,000 R.-P. M. or higher.

The cap is rotatably sul l drted at the'upper end .01 theyarn carrying spindle by an anti-friction 7 Claims. (or 51pm) as it is supplied 'to the core covering position to L 2 V yarn is formed in the central portion of the bridge bar. A cap constructed in this manner :is Sym metrical in design and does not disturb; the bal ance of the spindleon which it is; mounted. 'It is free from lateral projections that might strike and injure the machine'attendant, or produce objectional windage forces. It is easy 1' 0 thread up in various ways to securethe desired yarn tension, and has other advantagesas will hereinafter appear. y r

While the present-invention resides primarily in the construction and operationof the above described spindlecap, the -construction-of the antiiriction bearing that supports thecapis also important and particularly the arrangement whereby when the cap is used upon a con-rcovering spindle, the tale dust, released from the rubber core thread in the: hollowspindle;is'efiectivelyprevented-from reaching the -:anti-friction bearing andinterfering with its rotation. ;This ,protection of the anti-friction bearing fromgtalc is securedlargely by providing an inside bearing race that is tightly attached to the rotating 1ho1- low spindle, and an outsidewbearingrace that is secured directly to the cap.. Such a construction prevents talc from entering the hearing from; a point below the same. T le is further prevented from reaching the hearing by providing above the bearing an outwardly flaring head that extends over th bearing, and by providing, talc discharge holes below the bearing.

The above and other features of the present invention will be further understood from the following description when read in connection with the accompanying drawings; wherein Fig. 1 is a side elevation showing the. cap'of the' present invention appliedto a core covering device; i

Fig. 2 one larger scale is a vertical sectional view through the upper portion of the rotating hollow spindle and cap of Fig.1: y

Fig. 3 is a sideview of the cap of Fig. 2 shown removedfrom themeanswhich supports item the rotating spindle; this view shows how to thread up the covering yarn to secure a minimum amount of tension;

Fig. 4 is a vertical sectional view through the cap and shows the covering-yarn wound around the bridge bar to secure a high amount of. ten- 510111 Fig. is a vertical sectional view through the cap taken at right angles to Fig, 3;

Fig. 6 is a top plan viewof. the. cap of Fig. 5;

Fig. 7 is a view similar to Fig. l but shows how The cap of the present invention may be used' as shown on Sheet 1 of the drawings to produce a covered strand, such as a covered rubber thread, or it may be used as shown on Sheet 2 of the drawings to form a. twisted yarn or ply yarn. It can be employed on various types of core covering machines or yarn twisting machines now in use.

Now referring to the construction shown on Sheet 1, the device is illustrated in Fig. 1 of the drawing as applied to a motor driven core covering spindle such as shown in the patent above cited, but may also be used upon belt driven core covering spindles. A l p In the drawings, ill designates the upper end portion of an electric motor for driving the covering spindle H. This spindle is-made hollow and projects upwardly a substantial distance from the motor casing as shown to support and rotate a yarn package l2 at high speed. The yarn of this package is wound upon the usual paper tube I3, which tube fits snugly upon an adapter, comprising a tubular core secured to the head [3. This adapter serves to center and support the tube I3 0f the package upon the spindle l l.

The apparatus so far described by reference numerals is old and well known and constitutes one of a number of types of core covering units which maybe provided with the core covering means contemplated by the present invention and which will now be described. 5 v

The hollow spindle extends upwardly, as shown, some distance beyond the upper end of the yarn package l2, and the upper end of this spindle has-mounted thereupon a freely rotating top piece or'cap l4 adapted to guide and tension the covering yarn. This cap, as will be apparent from Figs. 2 to 6 inclusive, comprises a cylindrical sleeve IE to which is secured in elevated relation thereto a bridge member comprising the bridge bar l6 which is supported by the legs I'i that extend upwardly from the cylindrical portion l5. This bridge bar has the central hole I8 adapted to receive the rubberthread l9 passing upwardly through the hollow spindle ll. Each leg I! is preferably provided with a thread receiving hole through which the covering yarn Y supplied by the package I2 can be threaded. This yarn Y is shown in full lines in one position and in dot and dash lines in two positions of Fig. 1. The purpose of providing a hole 20 in each leg I1 is to make the cap easier to thread up, and also make the cap balanced as to centrifugal forces. The two holes will serve also to reduce the wear of the yarn upon the walls of each guide hole 20, since sometimes the yarn will be threaded through one hole 20 and other times through the other hole 20.

The cap just described may be formed of metal, but is preferably formed of some such tough durable. plastic material as nylon which is light in weight, non-corroding, easy to keep clean and offers good resistance to the wearing action of the rubber thread and covering yarn. The cylindrical portion l5 of this cap is preferably so made that it will frictionally engage the outer face of the outer race 2| of the anti-friction device to be described, and this sleeve is preferably provided with a slight shoulder at the lower end of each leg I! which forms a stop adapted to engage the upper edge of the race ring 2| as shown in Fig. 2. This prevents the cap from being pushed down too far upon the race ring.

The anti-friction bearing employed to rotatably support the cap [4 upon'the upper end of the hollow spindle H can be variously constructed and as shown comprises the outer race ring 21, inner race ring 22 and anti-friction balls 23. The inner race ring 22 is fitted tightly upon the relatively long, hollow, bearing post '24 which post fits snugly in the adapter bushing 25 that fits within the bore of the hollow spindle II. This bushing is locked in place by providing it with the annular recess 26 that receives the set screw 27 threaded in the upper portion of the hollow spindle l i. The arrangement is such that the cap supporting means just described may be assembled on the hollow post 24, and thenxthis post is forced tightly into thebushing 25. This bushing is then inserted in the upper end of the spindle l l and locked in this position by the set screws 21.

The rubber threads supplied to the covering apparatus usually has a thin coating of talc on its outer surface to give it a smooth surface that will run freely. Some of this talc is likelyhto become dislodged from'the threadat thelower end of the hollow post 24. This talc is prevented from reaching the anti-friction hearing from a point below the same by the construction shown,

whereby tight joints are formed that keep the I talc from working upwardly around the outer surface of the post 24, and such talc as passes up wardly through the central passage of this post is prevented from falling into the bearing by the outwardly flaring upper end 28 of this post.

. The talc which becomes dislodged from the rubber thread H! at the lower end of the postj24 'isdisposed of by providing the hollow spindle 'H with the four laterally disposed holes 29 whichform talc outlet passages, through which air willpass outwardly under the centrifugal force produced by the rapidly rotating spindle to carry the tale out to these holes. j The cap [4 constructed as above described provides a number of advantages; one being that the yarn tensioning and guide means comprises parts located within the diameter of the cap and has no structure extending laterally beyond the cylindrical portion I5 of the cap; and another advantage resides in the ease with which the cap can be attached to and removed from its supporting bearing when it is desired to clean or replace the cap. An extremely important feature of, the present cap resides in the bridge bar above described which acts upon the covering yarn Y to supply it to the covering point under the desired tension. If it is desired to supply the yarn Y to the covering point under minimum tension, then this yarn should be threaded through a hole 20 and direct to the covering position as shown'in Fig. 3. this yarn Y may be led through a hole29 and then laterally and upwardly against a side of the'br'idge bar to slide thereagainst as it passes to the covering point above thisbridge b'aigas shown in Fig. 2. If a still higher degree of tension upon theyarn Y is desired, this yarn may be led through a hole 2!] and then looped more than half wayaround the bridge bar as shown in Fi 4, to pass to a covering position below this bridge bar. The bridge bar 2| in addition to'controlling the tension at which the yarn Y is supplied to the cover- If a somewhat greater tension is desired ing point, serves also to control the location. of this covering point and prevent it 'fromhun'ting up anddown/ j i Having desci'ibedfhowjthe'cap of the present 'inve'ntionmay be employed upona core Covering device. to guide and tension the covering yarn, it will nowbe described as employed to twist asingle yarn, or ply twist two or moreiyarns together. In this connection it is desired to point out that the construction of the cap may be the same -for all of these used and it is shown the views of the drawings.

The apparatus of Figs. 7 and 8 shows a single yarn as being twisted. In Fig. 7 there is shown the solid spindle 30 on which there is frictionally mounted the adapter sleeve 3! having secured to its upper end the thick adapter head 32. On this adapter is mounted the paper tube 33 of usual construction and having wound thereon the supply of yarn 34, from which the yarn strand 35 extends upwardly.

Since the spindle 3b is not used as a core covering device it is shown solid in Fig. 8, and

at the top of this spindle is mounted the cap [4, above described, and comprising the cylindrical body [5 and bridge bar it. This cap has the holes 28 in the legs I l of the bridge bar and has the central hole 3 and the cap fits snugly on the outer race ring 2! as above described. The antifriction bearing comprising the balls 23 mounted between the rings 2! and 22 is preferably supported upon the spindle 38 by the parts 24, 25, 26 and 21 above described.

In employing the apparatus shown in Figs. '7 to inclusive, it is assumed that the single yarn or ply yarn is being pulled upwardly at a uniform speed by power driven rolls not shown. The single yarn 35 of Figs. 7 and 8 is shown as being twisted under a minimum amount of tension, and to this end the yarn passing through a side guide hole and then directly to the central hole H; to impart to this yarn the desired number of turns per inch. It then passes upwardly as indicated by the arrow. This cap will place very little tension on the yarn and permit a low twist yarn to be twisted at high speed without breaking.

The cap l5, I5 is shown in Fig. 9 as being employed to ply two yarns together to produce the ply yarn 36 and the desired amount of tension is exerted upon this yarn by bringing it inwardly along one side of a leg i? to pass through the hole 26 and then it passes around this leg to the central hole !8. The two yarns forming the ply 36 are wound side by side on the package 34.

The cap [5, i6 is shown in Fig. 10 as subjecting the single yarn 3'5 being twisted to high tension in that this yarn is shown as passing through one guide hole 20 and then across the cap to the other guide hole 253 before it passes to the central hole It. It will be apparent however that the yarn or yarns from the supply package may be twisted in various ways around the legs I! to secure the desired tension.

While the cap M is herein shown and described as mounted on the hollow spindle H or on the solid spindle 30, it may also be supported from the above mentioned adapter head l3, against which the yarn rests when it is not thrown outwardly by the rapid rotation of the spindle. In any case the cap should be small enough to permit the yarn package to be doffed without disturbing the cap.

It will be seen from the foregoing that the cap construction of the present invention possesses.

same in all a number of advantages, and that it is simple and symmetrical 'fin construction, landlprovides means whereby the tension exerted upon a cov'- ering yarn or yarn being twistedfcai n be' made as slight or as reat.as'desired; alsolthat.the antifriction bearing $1 517 "u pcrts the cap is well protected from the; alcppowderthatf may become dislodged from'jthe} rubber [core bein covered. Thecap l4b,eingf.li'ght 'inweight and compact in construction lend's'flji tself to'the high speed production of. the elastic yarnE'and-to the] yarn twisting operations above described,

Having thus described 'my.,invention, what. ,I claim and desire to protect .byILetters Patent; is: 1. A core covering device capablejof operating at high speed, comprising'in combination; ahollow spindle having means for rotating it" at high speed and adapted to support a package of core covering yarn, a cap rotatably supported by an antifriction bearing at the top of said spindle to turn freely independently of the spindle, a bridge bar secured to said cap and provided with a central core hole and with a laterally disposed yarn hole, and said bridge bar being constructed and arranged so that the covering yarn can be threaded up so that it will drag against a side of the bridge bar to tension it as it passes from said yarn hole to the core covering position.

2. A core covering device capable of operating at high speed, comprising in combination a hollow spindle having means for rotating it at high speed and adapted to support a package of core covering yarn, a plastic cap rotatably supported by an antifriction bearing at the top of said spindle to turn freely independently of the spindle and formed with a bridge bar, said bridge bar being provided with a central core hole and with a laterally disposed yarn hole and positioned so that the covering yarn can be threaded upin a manner to drag against a side of the bridge bar to tension it as it passes from said yarn hole to the core covering position.

3. A core covering device capable of operating at high speed, comprising in combination a hollow spindle having means for rotating it at high speed and adapted to support a package of core covering yarn, a cap rotatably supported by antifriction means at the top of said spindle to turn independently of the spindle, a guide bar extending upwardly and inwardly from adjacent an outer edge portion of the cap and provided with a core guide and a yarn guide and constructed so that the covering yarn can be threaded up to drag around part of this bar to tension it as it passes from said yarn guide to the core covering position.

4. A core covering device, comprising in combination a hollow spindle having means for rotating it and adapted to support a package of core covering yarn, a cap rotatably supported by an antifriction bearing at the top of said spindle to turn freely independently of the spindle and having a yarn guiding eye for guiding a covering yarn towards the core to be covered, said antifriction bearing having an inner race ring tightly secured to said spindle with a talctight joint, and an outer race ring that engages and supports the cap.

5. A core covering device, comprising in combination a hollow spindle having means for rotating it and adapted to support a package of core covering yarn, a cap rotatably supported by an antifriction bearing at the top of said spindle to turn freely independently of the spindle and having a bridge bar secured to the cap and provided with a core receiving guide eye and a yarn guide eye for, guiding the yarn to the core covering position; 1

6. In a device of the class described, a yarn supporting spindle having means for rotating it and a yarn package thereupon, a cap rotatably supported by an antifriction bearing at the upper end of said spindle to turn freely independently of the spindle, abridge barsecured to said cap and provided with a central hole and with a side hole, and said bridge bar being constructed and arranged so that yarn from said package can be threaded up so that it will drag against a side of the bridge bar to tension such yarn as it passes from said side hole toward the central hole.

7. In a device of the class described, a yarn supporting spindle having means for rotating it and a yarn package thereupon, a cap rotatably supported by an antifriction bearing at the upper end of said spindle to turn freely independently of the spindle, said cap comprising a cylindrical body having oppositely spaced legs extending upwardly therefrom and connected by a horizontal bar, the horizontal bar being provided with a central hole and each leg with a yarn hole, so that yarn from said package can be tensioned by causing it to drag around a leg as it passes from a yarn hole toward said central hole.

EDWIN G. EGGE.

No references cited. 

